Decoder desired for Mueller Systems Hot Rod transmitter (water meter) about rtl_433 HOT 8 OPEN

Is this the same device as discussed in this other issue thread?

Decoder for Mueller Hot Rod V1 Water Meter Transmitter #2752

from rtl_433.

Yes, that looks to be the same device.

from rtl_433.

That would be neat if they are using all the same protocol, but I am not sure that that is the case. Mine (in the referenced issue) is a "v1" unit that is "HI" power (SM6-HOTRODV1HI), for which I could not find FCC info or a test report...

from rtl_433.

Well, to investigate further, we'll need to look at some .cu8 files.

@howardtopher , would you please generate some .cu8 files from your device, zip, and post here?

from rtl_433.

Even though I have a hotrodv2, I believe it's using the same protocol as the v1 in the other issue. The first 8 digits in the codes are my meter ID. I've attached samples from my meter. I ran the water for a while and only got the consumption number to change one time. I can do this again if we need more samples.

codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {75}14426616042f1201f80
codes : {76}1442661604978900fc0
codes : {75}14426616092f1201f80
codes : {75}14426614092f1201f80
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {76}1442661604978900fc0
codes : {75}1442661604978900f80
codes : {76}1442661604978900fc0
codes : {77}1442661604978900fc00
codes : {76}1442661604978900fc0
codes : {76}1442661604979500570
codes : {76}1442661604979500570
codes : {76}1442661604979500570

hotrod-samples.zip

from rtl_433.

Oh, nice! These match mine, then (2752).
Take the first 64 bits and plug them into here with CRC-8/ITU:
https://crccalc.com/
And you get the checksum at the end.

You got a lot of high-quality codes. Did you use the same rtl_433 command that I did, or something different? How far were you from the transmitter? I'm wondering how I can improve the consistency of my reads.

from rtl_433.

You got a lot of high-quality codes. Did you use the same rtl_433 command that I did, or something different? How far were you from the transmitter? I'm wondering how I can improve the consistency of my reads.

Yes, I used the same command. I have my antenna in the attic and it happens to be on the same side of the house as the water meter. Meter is about 40 ft from the house, in the ground, just under a lid.

from rtl_433.

Oh, nice.
Mine were captured from inside the house but more like from ~150' from the meter, which is under a cast lid. I did mount the transmitter on the wall of the pit from the inside close to the surface, which improved reception. Putting the antenna on a ground plane (metal file cabinet) also made quite a big difference.

from rtl_433.